# Code for Dynamics of Rotating Bose-Einstein Condensate

Dear Forum Members,

I am currently working on solving the Gross-Pitaevskii (GP) equation for a rotating Bose-Einstein Condensate (BEC) in 2D and am in search of an example finite-element code that would allow me to study its dynamic evolution.

The 2D GP equation for a rotating BEC in these units can be expressed as:
i \frac{\partial \psi}{\partial t} = -\frac{1}{2} \nabla^2 \psi + \frac{1}{2} (x^2 + y^2) \psi - \Omega L_z \psi + g|\psi|^2 \psi
where \Omega is the angular velocity, L_z = xp_y - y p_x is the angular momentum operator, and g is the interaction strength.

For the initial condition \psi(t=0,x,y), letâ€™s simply consider, e.g., a 2D Gaussian wave packet with a small shifted center. I am particularly interested in tracking its dynamic evolution over time.

Additionally, I am wondering how the Mesh Adaptive Techniques could be incorporated into the code to facilitate the study of the dynamic evolution of vortex states.

Any guidance or example code would be greatly appreciated.

Noah